<h2>DESCRIPTION</h2>

<em>i.eb.eta</em> calculates the actual evapotranspiration (ETa ; mm/d) for
diurnal period after [1], implemented in [3].
It takes input of Diurnal Net Radiation (see <em>r.sun</em>), evaporative fraction (see
<em>i.eb.evapfr</em>) and surface skin temperature. 

<h2>NOTES</h2>
Full ETa processing will need those:
<ul>
  <li><em>i.vi</em>, <em>i.albedo</em>, <em>r.latlong</em>, <em>i.emissivity</em>
  <li><em>i.evapo.potrad</em> (GRASS Addon)
  <li><em>i.eb.netrad</em>, <em>i.eb.soilheatflux</em>, <em>i.eb.hsebal01</em>
  <li><em>i.eb.evapfr</em>, <em>i.eb.eta</em>
</ul>

(for time integration: <em>i.evapo.time_integration</em>) <!-- TODO unknown module -->

<p>For more details on the algorithms see [1][2][3][4].

<h2>SEE ALSO</h2>

<em>
<a href="r.sun.html">r.sun</a>,
<a href="i.eb.evapfr.html">i.eb.evapfr</a>,
<a href="i.eb.netrad.html">i.eb.netrad</a>
</em>

<h2>REFERENCES</h2>

<p>[1] Bastiaanssen, W.G.M., 1995.
Estimation of Land surface parameters by remote sensing under clear-sky
conditions. PhD thesis, Wageningen University, Wageningen, The Netherlands.
(<a href="http://edepot.wur.nl/206553">PDF</a>)

<p>[2] Chemin Y., Alexandridis T.A., 2001. Improving spatial resolution of ET
seasonal for irrigated rice in Zhanghe, China. Asian Journal of Geoinformatics.
5(1):3-11,2004. 

<p>[3] Alexandridis T.K., Cherif I., Chemin Y., Silleos N.G., Stavrinos E.,
Zalidis G.C. Integrated methodology for estimating water use in Mediterranean
agricultural areas. Remote Sensing. 2009, 1, 445-465. 
(<a href="http://www.mdpi.com/2072-4292/1/3/445">PDF</a>)

<p>[4] Chemin, Y., 2012. 
A Distributed Benchmarking Framework for Actual ET Models, 
in: Irmak, A. (Ed.), Evapotranspiration - Remote Sensing and Modeling. InTech.
(<a href="http://www.intechopen.com/books/evapotranspiration-remote-sensing-and-modeling/a-distributed-benchmarking-framework-for-actual-et-models">PDF</a>)

<h2>AUTHORS</h2>

Yann Chemin, Asian Institute of Technology, Thailand

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